Nikki - it can be one word but I'm saying to mean carelessly it should correctly be two ... I had a one-word original (misled by the o in the fifth space) which does mean carelessly. No, nothing to do with geography - it's a noun used in this case as an adjective usually cosmetic.
I'm not any closer to solving 7a, despite all the previous hints. Also not clear how "last part of meeting" relates to the two (or three) letters I need for 15a.
The 22A in 7A is obscure and begins with the same letter as the 22A in 13D.
Common abbrs for computer and University with a and "choice" in the sense of "best".
The last part of meeting (on the agenda), 3 letters.